Oil-pump



1. vPETTIT. .Y

OIL PUMP.

y APPLICATION FILED APH. I3, |920. 1 ,350,939, Patented Aug. 24, 1920.

UNITED JOHN rn'rrrr, or rnrfr, CALIFORNIA.

OIL-PUMP.

Specification of Letters Patent.

Patented Aug. 24, 1920.

Application filed April 13, 1920. Serial No. 373,510.

To @ZZ whom t may concern.'

Be it known that I, JOHN Pnrrlr, a citizen of the United States, residing at Taft, in the county of Kern and State of California, have invented certainnewand useful Improvements in Oil-Pumps, of which the following is a specification.

rThis invention relates to pumps and more particularly to pumps employed in wells having sand and like foreign matter in the iuid, and has for one of its objects to provide a simply constructed device adapted to be attached Y to the movableA valve of the pump whereby the sand and like material is prevented from settling upon the ordinary valve and cutting out the packing elements. Y l f Another object of the invention is to provide a device of this character which may be attached to various forms of movable valves without material structural change either in the valve or in the attachment.

Tn oil or other like wells in which sand is mingled with the fluid, the sand is very liable to cut out the relatively fragile leather packings of the movable valve preventing the pump from functioning, and when this occurs it is necessary to pull the pump, replace the impaired packing and return the pump to the well. This is an expensive and time consuming operation, and to protect the packing rings and other fragile parts of the pump from the action of sand, I have devised the device which is the subject matter of the present application, and in the drawings illustrative ofthe preferred emk bodiment of the invention,

Figure 1 is a sectional elevation of the improved device.

Fig. 2 is a transverse section on the line 2-2 of Fig. 1, with-the supplemental valve removed.

Fig. 3 is a transverse section on the line 3-3 of Fig. 1.

For the purpose of illustration the improved device is shown installed in connection with an ordinary deep well pump including a pump barrel 10, a standing or stan tionary valve represented'as a ,whole at 11, and a movable or piston valve-represented as a whole at 12. The cage or valve chamber portion 13 of the movable valve is formed with an annular valve seat 14 rising from its upper face, and communicating with the interior of the cage by a plurality of ports or passages 15. A ring valve 16 bears uponthe annular seat 14.

Attached at its lower end lin the center of the cage portion 13 of the movable valve is a tubular conductor or stem 17.

Attached to the outer edge of the cage portion 13 of vthe movable valve is a tubular member 18 extending upwardly within the barrel 10 and outturned at its upper end as shown atl 19 and moving thereby in close contact with the inner face of the barrel.

A spring 20 is arranged to exert its force on the supplemental or ring valve 16 and hold the latter yieldably on its seat.

Attached-to the upper end of the stem `'member 17 is a hollow head 21 having a threaded stud 22 to which the sucker rod, a portion ofwhich is represented at 23 is attached.

Located within the hollow head 21 is a valve 24 held yieldably on its seat, which is the upper end of the stom 17, by a spring 25.

Formed in the head 21 are passages 26 providing communication between the interior or valve chamber part of the head and the settling chamber formed by the tubular member 18. Attached to the head 21 and communicating with each of the passages 26 are pipes 27, the latter being preferablyof unequal length, discharging at their lower ends within the settling chamber and some distance above the bottom of the settling chamber and the ring or supplemental valve 16.

The tubing 28 of the pump is coupled inthe usual manner at 29 to the barrel 10.

When the operation of the pump is stopped for any cause, for instance at night, the sand Vin the iuid which has passed through the main or movable valve and into the tube 28, settles into the chamber formed by the tubular member 18 and upon the ring or supplemental valve 16 and around the tubular stem 17, but does not reach the main movable valve or its packing members. Then Vwhen the pumping action is resumed, the fluid'passes upward through the stem 17 displaces'the valve 24 and passes downward. through the passages 26 and tubes 27 with considerable force and in contact with the sand in-the settling chamber which it dislodges and agitates and causes it to commingle with the fluid and passes out therewith through the tube 28.

When the sand which has settled in the chamber has been thus dislodged from the supplemental valve the resistance against the latter is reduced to an extent suflicient to permitv the fluid to flow henceforth through the passages 15, naturally following Y the course of least resistance.

y The tubes 27 being of unequal length, if the settled sand rises above the open end of the longer tube the fluid flowing from the shorter tube will soon dislodge the sand to a'suicient extent to release the longer tube.

The tubular member 18 must be of lsufficient length, and the space beneath the tubes 27 be sufhciently great, to provide room for all the sand which may gather during the stoppage of the pump, so that wheny the pumping action is resumed, the flowing fluid will properly agitate and dislodge the accumulated sand, as before described, and the Vlength of the tubes 17, 18 and 27 may be varied as circumstances may require.

Y The preferred embodiment of the invention is disclosed in the drawingsY and set forth in the specification, but it will be understood that any modifications within the scope of the claims may be made in the vconstruction without departing from the -principle of the invention or sacrificing any of its advantages.

I claim:

l. A device of the class described including a pump barrel, a standing valve and a movable valve, a supplemental valve bearing on the movable valve, a tubular settling chamber attached to the movable valve and inclosing the supplemental valve, a tubular conductor communicating with the movable valve, a hollow head member connected to the conductor to which a sucker rod is adapted to be attached, a valve within the head and engaging the conductor, and a plurality of tubes depending from the head and discharging into the settling chamber.

2. The combination with the movable valve of a pump having a supplemental valve at its discharge end, ofl a tubular settling chamber attached to the movable valve and inclosing the supplemental valve, a tubular conductor extending from the movable valve within the settling chamber, a hollow head attached to the conductor, and to which a sucker rod is adapted to be attached, a valve operating to close the conductor, and a plurality of tubes depending from the head within the settling chamber.

In testimony whereof aflix my signature hereto.

JOHN PETTT. 

